Compilare: user.cpp: In function ‘int main()’: user.cpp:76:10: warning: unused variable ‘mn1’ [-Wunused-variable] int mn1 = 1 << 30; ^ user.cpp:124:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vec.size(); ++i) ^ user.cpp:47:15: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int nr = 0, ok; ^ user.cpp:79:22: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int xz, yz, x1, y1; ^ user.cpp:79:18: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int xz, yz, x1, y1; ^ user.cpp:79:14: warning: ‘yz’ may be used uninitialized in this function [-Wmaybe-uninitialized] int xz, yz, x1, y1; ^ user.cpp:79:10: warning: ‘xz’ may be used uninitialized in this function [-Wmaybe-uninitialized] int xz, yz, x1, y1; ^